Door-operating mechanism



D. HINDAHL. 000B OPERATING MECHANISM. APPLICATION man Nov. 1o. 1919.

1,886,406 v Patented Aug. 2, 1921.

2 SHEETS-SHEET 1'. F

Patented Aug. 2

UdV 1295555.'

5W. @www UNITED STATES PATENT OFFICE,

DAVID HINDAHL OF CHICAGO, ILLINOS, ASSIGNOR TO NATIONAL DUMP CARCOMPANY, OF CHICAGO, ILLNOIS, A CORORATION OF MAINE.

DOOR-OPERATING IvIECHANISM.

Application filed November 10, 1919.

To all whom-ff may concern.'

Be it known that l, DAVID HiNriAHL, a Citizen of the United States,residing at Chicago, in the countyorp Cool: and State of lllinois, haveinvented certain new and useful improvements in Door-@peratinglvlechanism. of which the 'following is a specification.

This invention relates to door operating mechanism, particularly inconnection with general service cars.

The objects of the invention are to provide a simple and eilicient dooroperating mechanism which is positive in its action and so arranged thatno strain is placed upon the mechanism tending to distort it, thusminimizing repairs; to )r vide a device which can be easily operated bythe class of lever usually employed for such purpose.; and to provide anoperating device so arranged as to increase the eliiciency of thecar inunloading.

These and other objects are accomplished by means ot the arrangementdisclosed on the accompanying' sheets oi drawings, in which-f Figure 1is a tragmentary side elevation of a general service carV embodying myinvention; l

Fig. 2 is a transv se sectional view ot' th'A same taken in the plane ofline 2-2 of 1; andY 3 is a detailed sectional view on an n gedscaleshoiving the door operating n y'.nisrn in one ot its positions.

.fihe various novel features of the invention will be apparent from thefollowing our description andtho drawings, and will be particularlypointed out in the appended claims.

This invention is an improvement on the arrangement disclosed in theHart Patent No. 1,818,447 granted October 14, 1919, and in view ot thefact that many advantages are common to the door operating mechanismdisclosed therein and in my present arrangement, only the particularimprovements claimed herein will be particularly described.

I have chosen to illustrate my invention in connection with a generalservice car having sides 10, ends 11, and a door composed largely ofdump doors 12 which are pivotally connected at their inner ends to thecenter sill structure 13, the frame-work Specification of LettersPatent.

Patented AuO. 2, 1921.

sei-iai No. 337,003.

ot the car including transverse supporting and strengthening members 14which are provided with stop members 1Ij upon which the dump doors 12rest in an open position. @This invention has to do primarily with a'door operating mechanism. Having in d the disadvantages of dooroperating devices heretofore employed and the advantages ot the presentdoor operating mechanism7 attention is called to the tact that each otthe dump doors is raised from an open position to a closedposition'separately and independently of any other one or the doors.

Slidably secured to the bottom of each one of the doors, at the outeredge thereof and preferably midway the length of the tch 16 having adownwardly A 1T, the function of which will be o late l. i l.

Eis shown in full lines at the right hand the dump door 12 is in itsoosition. Under suoli condiao open ing shaft 1S, which is later- H u `nbx led on the under side ot each or' the door Tith the latch in itsinward, non-functioning position. the door 12 may be raised closedposition. whereupon the latch will be moved outwardly into a positionV.Where it rests upon and is supported by the shaft 18 with the latterin its outermost position. Accordingly the door 12 is supported in itsraised or closed position by the operating shaft through the slidinglatch 16. This supporting arrangement, however, is a temporary one, butas soon as all of the dump doors have been raised into closed positionand their slidably mounted latches have been moved outwardly by hand torest upon the associated shaft, as indicated in Fig. 3, the shaft may bemoved laterally inwardly to a position under the doors tor permanentlysupporting the latter. During the inward movement oLt the shaft 18. itengages the dependent lingers 17 on the latches 16, causing the latchesto be moved inwardly at least to a point where thev outer edges of Vthelatches are flush with the outer edges of the dump doors 12, as shown atthe left hand side of Fig. 2. lt is apparent that after the shaft is nowmoved outwardly beyond the outer edges of the dump doors, the latter arefree to drop into an open position for dumping purposes. It is seen,therefore, that the dump doors arev raised directly and independently byhand and are temporarily held in closed position by the shaft throughtheoverlying latches, the load later being transferred permanently tothe shafts when the rshafts are moved inwardly under the doors, at whichtime the latches also are moved inwardlyk into a non-latching position,the shafts in their1 innermost positions vunder thedoors forming` apermanent sup- Y theoar, so that the doors 12 are given their CID .finalclosing movement as the shafts are moved inwardly. ln this particularcase, to facilitate the operation of the shafts, the latter are providedwith toothed wheels 22 which cooperate with associated toothedstaltionary racks 23 carried by the doors. rlhe rlie chains 24:' may beconnected to the' shafts by any suitable means such as a boltV or rivet2G and said chains may be adjustably connected to the brackets 25 by eyebolts 22' and nuts 28.

t will be notedV that the doors need not,

be provided 'permanently with levers for i of ctober, 1919.

raising them, it merely being necessary to insert temporarily into thesocket members 2l anyv stake which may be handy at the time. The socket21, in .each case, comprises a casting having at its rear end areceiving opening and also spaced depending projections at the frontvbetween which the stake is received. y y Y It is my intentionto Vcoverall modifications of the invention falling within the spirit and scopeyof the following claims.

l claimi i l 1. ln a general service car having aplarality of doors, ashaft, means for directly lifting said doors'individually, meansengaging said shaft for temporarily holding said doors in raisedposition, and means including a flexible member for permanently holdingsaid doors in raised position.

2. In a general service car having a door, a shaft, hand operated meanscarried'by said `door for engagingA said shaft for temporarilysupporting the door in a' givenA position, and a chain connecting astationary part of the car with said shaft'whereby when the latter isrotated the chain willbe wrapped thereon during a movement of the shaftunder the door for permanently supporting the latter. Y

3. ln a general' service car having a door,

a shaft, means whereby said door maybe temporarily held in raisedposition by said shaft, and means including a flexible member connectedto saidA shaft whereby the latter may permanently'support said door inraised4 position. Y

ln a general serviceV car having a door, a shaft, a transverse framemember having a slot in which said A.shaft is laterally movble, meanswhereby the door may be temporarily held in raised fposition by saidshaft and a exible connection for said shaft whereby 'the latter may bemoved Vin ksaid slot to permanently support the door in raised position.

Signed at Chicago,

DAVID HINDAHL.

Illinois, this 31st day

